temperature change and CRN

[wydim]

Hello all,

I've obtained a CRN (Canadian Registration Number) for a pressure vessel. The design temp is 140°F.
we have yet to start fabrication of the vessel.
Now the client asks us to change the temperature rating to 180°F.
do I need to request a change with the Inspetion Agency (to resubmit all the calcs and updated, sealed drawing (effectively just a nameplate change)) ?
or can I just make the changes internally and make a revision B drawing and write it on the U-1A data report : ''final drawing XXXXXXXXXX rev B''
as you imagine, this temperature change doesn't change anything other than the number on the nameplate.

regards,

 

[david339933]

Technically yes as the CRN is registered with an associated MAWP @ temp. Even though you could probably go to 400F without any real design changes.
Best thing is to get in touch with the AIA and see what they would like.

 

[jmec87]

Yes, if you are increasing the design temperature you need to request a change request to the relevant jurisdiction(s) with the updated calculations, drawings, and application paperwork.

 

[wydim]

thank you !
as you said, I've got confirmation by our AI to submit a revision request for the CRN for the temperature change.
It's funny, as soon as you tell the client that there are fees for that change, the temp rating at 140°F is fine.